US4419314A - Method of coating core samples - Google Patents
Method of coating core samples Download PDFInfo
- Publication number
- US4419314A US4419314A US06/266,990 US26699081A US4419314A US 4419314 A US4419314 A US 4419314A US 26699081 A US26699081 A US 26699081A US 4419314 A US4419314 A US 4419314A
- Authority
- US
- United States
- Prior art keywords
- sample
- coating
- core sample
- mold
- core
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B25/00—Apparatus for obtaining or removing undisturbed cores, e.g. core barrels, core extractors
- E21B25/08—Coating, freezing, consolidating cores; Recovering uncontaminated cores or cores at formation pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C39/10—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
- B29C70/70—Completely encapsulating inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2063/00—Use of EP, i.e. epoxy resins or derivatives thereof, as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/40—Test specimens ; Models, e.g. model cars ; Probes
Definitions
- This invention relates to a method of coating core samples and more particularly to a method of applying an epoxy resin coating to core samples removed from well boreholes.
- the various characteristics of the core sample are measured with the sample mounted in a core holder, illustratively of the triaxial type, which has various pressure and other connections for making the desired measurements.
- the sample is positioned within the holder in a deformable rubber or plastic sleeve, and a confining pressure is applied to the sleeve which may approximate the underground effective overburden pressure to which the sample had been subjected prior to its removal from the borehole.
- One general object of this invention is to provide a method for coating core samples removed from well boreholes.
- Another object of the invention is to provide such a method in which the coating effectively prevents the deleterious loosening of grains from the surface of the sample.
- a further object of the invention is to provide a method for coating a core sample in a straightforward and inexpensive manner.
- the core sample is thoroughly cleaned, and petroleum jelly is applied as a barrier or release material to its exterior surface.
- the sample is then coated in a mold with a plastic mixture of hardenable epoxy resin and hardener.
- the dimensions of the mold are carefully controlled in relation to the dimensions of the core sample to provide an extremely thin but rigid coating on the sample.
- the coating is cured in a unique manner, and the ends of the coated sample are cut away to expose the sample material.
- the mold is first partially filled with the plastic mixture, and the core sample is then slowly inserted into the mold under a pressure which is not more than about 50 pounds per square inch. As the sample is inserted, the mixture flows up the side of the sample until it covers the upper, exposed end. The resulting coating is thin with very few voids or other imperfections.
- one end of the sample is coated with a plastic mixture of hardenable epoxy resin and hardener, and the coating is cured sufficiently to effectively seal the coated end.
- the coated end serves as a barrier to prevent the plastic mixture within the mold from entering the interior of the sample to any appreciable extent.
- the space between the exterior surface of the core sample and the interior of the mold is at least about 0.010 cm. and not more than about 0.050 cm., with the result that the thickness of the coating is maintained within this range.
- the coating thickness is sufficient to prevent the coating from intruding into the sample pores during the application of the confining pressure while at the same time the coating is thin enough to provide the necessary flexibility to transmit the confining pressure to the sample.
- the coating on the core sample is cured by maintaining it at room temperature for at least about four hours and thereafter maintaining it at an elevated temperature for at least about eight hours.
- the curing procedure further enhances the overall integrity of the coating.
- FIG. 1 is a vertical sectional view of a cylindrical core sample which is to be coated through the use of a method in accordance with an illustrative embodiment of the invention.
- FIG. 2 is a vertical sectional view of the core sample of FIG. 1 after a barrier material has been applied thereto.
- FIG. 3 is a vertical sectional view of the core sample of FIG. 2 with a plastic coating on one end thereof.
- FIG. 4 is a vertical sectional view of a mold for applying a plastic coating to the entire exposed surface of the core sample.
- FIG. 5 is a vertical sectional view of the mold of FIG. 4 with the core sample inserted therein.
- FIG. 6 is a side elevational view of the coated core sample after its removal from the mold.
- FIG. 7 is a fragmentary vertical sectional view of a core holder for the sample.
- FIG. 1 of the drawings there is shown a core sample 10 taken from a well borehole.
- the sample 10 comprises a generally cylindrical section of the underground solid formation and has a more or less porous structure with occasional pore spaces or voids in its cylindrical surface 11 and its end surfaces 12 and 13.
- the sample is to be tested for such characteristics as porosity, permeability, compressibility, water content, hydrocarbon saturation, etc.
- direct information relating to fluid flow characteristics, physical, chemical, electrical and acoustic properties, and the like also is of value and can be obtained only from an actual sample of the formation.
- the core holder comprises a hollow body portion 15 of generally cylindrical configuration which is provided with end caps 17 and 18 having appropriate channels 20, 21 and 22 for the application of pressures and fluids in accordance with the particular tests being conducted.
- the core sample 10 is inserted within a flexible rubber or plastic sleeve 25, and the assembled sleeve and sample are mounted within the body portion 15 between two permeable steel discs 27 and 28 which are located adjacent the respective ends of the sample.
- connection 30 Extending radially from the axial midpoint of the body portion 15 is a pressure connection 30.
- the connection 30 is integrally formed with the body portion 15 and is provided with a channel 31 which communicates with the interior of the body portion. During the making of a particular measurement, the confining pressure is applied through the channel 31 to the flexible sleeve 25 and hence to the core sample 10.
- the core sample is encased in a plastic coating 35 which is sufficiently rigid to prevent the intrusion of either the plastic or the sleeve into the pore spaces and yet is sufficiently flexible to enable the application of the desired confining pressure to the sample.
- the core sample is first cleaned of salt and oil by flushing the sample with methanol and other organic cleaning material.
- the sample is then placed in an oven and is dried at an elevated temperature, illustratively 180° F.
- a barrier material 37 is applied to the entire exposed surface of the cleaned and dried core sample 10.
- barrier materials may be used for this purpose, petroleum jelly or other petroleum distillate is preferred because of its good release properties.
- the material 37 is worked into the cylindrical surface 11 and the end surfaces 12 and 13 of the sample 10, and any excess material is removed by a jet of air or by hand rubbing.
- the material for the coating 35 comprises a conventional plastic mixture of hardenable epoxy resin and a suitable hardener therefor.
- a suitable hardener therefor.
- the coating compound available commercially from the Dexter Corporation, Olean, N.Y., and identified by the trade name HYSOL coating compound C9-4183.
- the hardener used with the compound is Dexter's hardener H9-3469.
- a layer 38 (FIG. 3) of the plastic mixture is applied over the entire area of the surface.
- the thus formed end coating is permitted to cure at room temperature for at least about four hours to provide a fluid impervious seal.
- the plastic coating 35 is applied to the core sample 10 in a cylindrical mold 40.
- the mold 40 comprises a stainless steel cylinder having a polished interior wall 41 and a base member 42 which closes the lower end of the mold.
- the inside diameter of the mold 40 should be maintained within well-defined limits in relation to the core sample 10 to similarly maintain the thickness of the coating 35 within these limits.
- the inside diameter of the mold should be at least about 0.020 cm. and not more than about 0.100 cm. greater than the diameter of the core sample in order to provide a coating thickness within the range of about 0.010 cm. to about 0.050 cm.
- the coating can exhibit insufficient strength to resist intrusion into the pores of the sample under the high confining pressure applied through the channel 31 (FIG. 7) of the core holder, while if the thickness exceeds about 0.050 cm. the coating becomes too rigid and may not adequately transmit the confining pressure to the sample.
- the mold 40 is coated with a suitable mold release material and is then partially filled with the plastic mixture of hardenable epoxy resin and hardener immediately after the mixture is prepared.
- the mixture by weight is illustratively 93% C9-4183 HYSOL epoxy resin and 7.0% H9-3469 aromatic/alaphatic amine hardener.
- the lower end 13 of the core sample 10 is slowly inserted in the partially filled mold to cause the plastic mixture to flow up around the cylindrical surface 11 of the sample and over the upper end 12. As the sample 10 enters the mold 40, pressure is applied to the end 12 to urge the sample into the plastic mixture at a carefully controlled rate.
- This pressure advantageously is not more than about 50 pounds per square inch, because for higher pressures the sample enters the mixture too rapidly and causes the entrapment of air which creates open spaces or thin wall sections in the coating, and the plastic may be forced into pores adjacent the lower surface 13.
- the minimum pressure applied during the insertion of the sample for the most part depends on the setting time of the mixture, but the pressure generally should not be less than about 5 pounds per square inch. If the applied pressure is much below this figure, the sample enters the mixture too slowly with the result that the mixture tends to begin hardening before the sample reaches its fully inserted position. Particularly good results are achieved by maintaining the pressure at about 9 or 10 pounds per square inch.
- the applied pressure may be greater than would otherwise be the case.
- the layer 38 serves as a barrier which prevents the flow of plastic into the pore spaces in the vicinity of the end 13, and the sample may be inserted into the mold 40 at a more rapid rate.
- FIG. 5 is an illustration of the core sample 10 in its fully inserted position within the mold 40.
- the sample 10 is maintained in the mold during the ensuing curing of the plastic mixture.
- the mixture is cured by first holding it at room temperature for a period of time sufficient to permit the plastic to set up and by thereafter placing the mold in an oven to maintain the mixture at an elevated temperature for a period of time sufficient to complete the curing of the material.
- the curing times will depend in part upon the particular type of coating material and on the ambient conditions to which the material is subjected, particularly good results are achieved by continuing the room temperature curing for at least about four hours and by then holding the mixture at an elevated temperature of approximately 180° F. for at least about eight hours.
- the base member 42 is removed, and the coated core sample 10 is removed from the mold 10 by pressing the upper end 12.
- the ends 12 and 13 are then cut off through the use of a suitable saw, for example, as shown schematically by the broken lines 45 and 46 in FIG. 6. These cuts should be made at right angles to the axis of the sample 10 and at a sufficient distance from the sample ends to remove all traces of plastic from the exposed ends.
- the completed coating 35 covers the entire peripheral surface 11 of the core sample 10.
- the coating accurately conforms to the sample surface but does not bond to it because of the layer 37 of petroleum jelly.
- the coating is thin and stiff with very few voids or other imperfections and has a thickness within the above described limits.
- the coated core sample 10 is positioned within the core holder shown in FIG. 7 and is flushed with toluene, hexane or other organic solvent to remove the petroleum jelly from the pore spaces.
- the sample is then thoroughly dried by maintaining it in an oven at a temperature of, say, 180° F. The thus dried sample is in condition for the running of the various tests discussed heretofore.
- the test sample was cleaned of hydrocarbons with toluene, bleached of salt with methanol and thoroughly dried. A porosity determination was made and showed that the sample had a porosity of 1.5 percent.
- the dried sample was coated with petroleum jelly and the excess was removed by hand rubbing.
- a plastic mixture was prepared of 93 percent by weight C9-4183 HYSOL epoxy resin and 7 percent H9-3469 aromatic/alaphatic amine hardener.
- a stainless steel right cylinder mold having a polished interior and a three-eights inch wall was attached to a base member as illustrated in FIG. 4, and a film of HYSOL AC4-4368 mold release was sprayed on the interior wall.
- the mold was then partially filled with enough plastic mixture to cover the sample that was subsequently submerged in it.
- the sample was slowly pressed in the plastic through the top of the mold, and plastic flowed between the sides of the sample and mold until the top of the sample was covered.
- the sample was submerged at a slow rate to enable the plastic to coat the sample without trapping air.
- the plastic coated sample was maintained within the mold at a room temperature for about four hours and cured overnight in the mold at about 180° F. in an oven. The sample and mold were then removed from the oven and allowed to cool slowly to avoid cracking the thin plastic coating. The base member was then detached, and the plastic coated sample was pushed out of the mold far enough to expose one end. The exposed end was cut around the plastic with a sharp instrument until the plastic on the end came off. The end of the sample was ground with emery paper laid flat on a cabinet top until the end was flat and perpendicular to the axis of the mold and the sample grains were exposed. Most pore spaces were seen under a microscope to be free of plastic.
- the sample was then pressed toward the opposite end of the mold until the other end of the sample was exposed, and it was cut and ground in a similar manner.
- the sample was then pressed out of the mold, and toluene was passed through the sample to remove the residual petroleum jelly and to establish that the pore spaces could be vented during the actual testing.
- the thickness of the plastic coating on the sample was 0.025 cm.
- the sample was then dried, saturated with brine and inserted into a right steel cylinder similar to that used for the mold.
- An axial test was run using a hydraulic press to stress the sample along its axis and a dial indicator for length change readings to 0.0001 inch.
- the maximum confining pressure that the sample was subjected to during testing was 10,000 pounds per square inch.
- Predetermined plastic permeability and instrument corrections were used in the course of calculating the sample compressibility from the measured data. The test results were acceptable to experienced analysts.
- the wall thickness of the plastic coating on the sample was 0.041 cm.
- the maximum confining pressure that the sample was subjected to during testing was 10,000 pounds per square inch, and the porosity of the sample was 19.6%. The results of this test were acceptable to experienced analysts.
- a siltstone sample was cut from a full diameter core obtained from a well borehole for a uniaxial compressibility test. The sample was cut as close as possible to a right cylinder. The diameter of the sample was 2.520 cm.
- the sample was prepared and tested as described in Example I. The test results were acceptable to experienced analysts.
- the wall thickness of the plastic coating on the sample was 0.010 cm.
- the maximum confining pressure that the sample was subjected to during testing was 8000 pounds per square inch, and the porosity of the sample was 9.16%.
- a sandstone sample was cut from a full diameter core obtained from a well bore for hydrostatic compressibility testing. The sample was cut as close as possible to a right cylinder.
- the sample was cleaned of salt and hydrocarbons and dried. Air permeability and porosity determinations were made, and the resulting measurements showed that the sample exhibited high permeability and moderate porosity.
- Example II The sample was then coated with petroleum jelly as in Example I.
- a plastic cup similar to the layer 38 (FIG. 3) was placed on the bottom end of this high permeability sample, and the cap was allowed to harden at room conditions. The cap was sanded on the edges where it extended beyond the diameter of the sample.
- the sample was then coated with plastic and cured as described in Example I, and the ends were sawed off to obtain sample ends that were free of plastic.
- the wall thickness of the plastic coating on the sample was 0.020 cm.
- the sample was then placed in a rubber sleeve core holder, and a compressibility test was performed in a conventional manner under a confining pressure which reached a maximum of 5,400 pounds per square inch. The test results were acceptable to experienced analysts.
Abstract
Description
Claims (7)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/266,990 US4419314A (en) | 1981-05-26 | 1981-05-26 | Method of coating core samples |
CA000403612A CA1188063A (en) | 1981-05-26 | 1982-05-25 | Method of coating core samples |
NO821738A NO159437C (en) | 1981-05-26 | 1982-05-25 | PROCEDURE FOR PLANTING CORE CORE SAMPLES. |
GB8215417A GB2098919A (en) | 1981-05-26 | 1982-05-26 | Coating a core with plastic |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/266,990 US4419314A (en) | 1981-05-26 | 1981-05-26 | Method of coating core samples |
Publications (1)
Publication Number | Publication Date |
---|---|
US4419314A true US4419314A (en) | 1983-12-06 |
Family
ID=23016852
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/266,990 Expired - Lifetime US4419314A (en) | 1981-05-26 | 1981-05-26 | Method of coating core samples |
Country Status (4)
Country | Link |
---|---|
US (1) | US4419314A (en) |
CA (1) | CA1188063A (en) |
GB (1) | GB2098919A (en) |
NO (1) | NO159437C (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4637904A (en) * | 1983-11-14 | 1987-01-20 | Rohm And Haas Company | Process for molding a polymeric layer onto a substrate |
US5009512A (en) * | 1987-06-30 | 1991-04-23 | Institute Francais Du Petrole | Device and method for measuring the deformations of a sample |
US5840148A (en) * | 1995-06-30 | 1998-11-24 | Bio Medic Data Systems, Inc. | Method of assembly of implantable transponder |
BE1012111A3 (en) * | 1998-08-06 | 2000-05-02 | Baroid Technology Inc | Core drilling method |
US6161450A (en) * | 1995-03-03 | 2000-12-19 | Hasse & Wrede Gmbh | Viscosity-type torsional-vibration damper |
US6547998B1 (en) * | 1999-02-17 | 2003-04-15 | Volvo Aero Corporation | Method for preparation of test bodies |
US20100126266A1 (en) * | 2007-04-26 | 2010-05-27 | Joseph Guillaume Christoffel Coenen | Formation core sample holder assembly and testing method |
EP2604996A1 (en) * | 2011-12-14 | 2013-06-19 | Geoservices Equipements | Method for preparing a sample of rock cuttings extracted from a subsoil and associated analysis assembly |
CN113107477A (en) * | 2021-05-27 | 2021-07-13 | 成都理工大学 | Portable field sample preservation method |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4587857A (en) * | 1984-10-18 | 1986-05-13 | Western Geophysical Company Of America | Method for mounting poorly consolidated core samples |
FR2692314B1 (en) * | 1992-06-10 | 1994-09-23 | Total Sa | Consolidation and sealing process for a rock sample. |
NO933291L (en) * | 1992-09-18 | 1994-03-21 | Halliburton Co | The core stabilization |
GB9417500D0 (en) * | 1994-08-31 | 1994-10-19 | Gore W L & Ass Uk | Encapsulation method |
GB9810898D0 (en) * | 1998-05-20 | 1998-07-22 | Nullifire Ltd | Apparatus and method for casting a coating onto a pillar |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2737804A (en) * | 1951-06-13 | 1956-03-13 | Texas Co | Relative permeability measurements |
US2842958A (en) * | 1956-01-27 | 1958-07-15 | Pure Oil Co | Apparatus for measuring flow characteristics of porous specimens by displacement |
US3059283A (en) * | 1958-03-31 | 1962-10-23 | Jefferson Electric Co | Method of making a waterproof transformer seal |
US3199341A (en) * | 1962-05-28 | 1965-08-10 | Continental Oil Co | Method and apparatus for measuring compressibility of porous material |
US3242446A (en) * | 1963-07-03 | 1966-03-22 | Mc Graw Edison Co | Bushing construction for encapsulated transformers |
-
1981
- 1981-05-26 US US06/266,990 patent/US4419314A/en not_active Expired - Lifetime
-
1982
- 1982-05-25 CA CA000403612A patent/CA1188063A/en not_active Expired
- 1982-05-25 NO NO821738A patent/NO159437C/en unknown
- 1982-05-26 GB GB8215417A patent/GB2098919A/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2737804A (en) * | 1951-06-13 | 1956-03-13 | Texas Co | Relative permeability measurements |
US2842958A (en) * | 1956-01-27 | 1958-07-15 | Pure Oil Co | Apparatus for measuring flow characteristics of porous specimens by displacement |
US3059283A (en) * | 1958-03-31 | 1962-10-23 | Jefferson Electric Co | Method of making a waterproof transformer seal |
US3199341A (en) * | 1962-05-28 | 1965-08-10 | Continental Oil Co | Method and apparatus for measuring compressibility of porous material |
US3242446A (en) * | 1963-07-03 | 1966-03-22 | Mc Graw Edison Co | Bushing construction for encapsulated transformers |
Cited By (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4637904A (en) * | 1983-11-14 | 1987-01-20 | Rohm And Haas Company | Process for molding a polymeric layer onto a substrate |
US5009512A (en) * | 1987-06-30 | 1991-04-23 | Institute Francais Du Petrole | Device and method for measuring the deformations of a sample |
US6161450A (en) * | 1995-03-03 | 2000-12-19 | Hasse & Wrede Gmbh | Viscosity-type torsional-vibration damper |
US5840148A (en) * | 1995-06-30 | 1998-11-24 | Bio Medic Data Systems, Inc. | Method of assembly of implantable transponder |
BE1012111A3 (en) * | 1998-08-06 | 2000-05-02 | Baroid Technology Inc | Core drilling method |
US20030124274A1 (en) * | 1999-02-17 | 2003-07-03 | Sven-Olof Stalberg | Method for preparation of test bodies |
US6547998B1 (en) * | 1999-02-17 | 2003-04-15 | Volvo Aero Corporation | Method for preparation of test bodies |
US6960542B2 (en) | 1999-02-17 | 2005-11-01 | Volvo Aero Corporation | Method for preparation of test bodies |
US20100126266A1 (en) * | 2007-04-26 | 2010-05-27 | Joseph Guillaume Christoffel Coenen | Formation core sample holder assembly and testing method |
US8356510B2 (en) * | 2007-04-26 | 2013-01-22 | Shell Oil Company | Formation core sample holder assembly and testing method |
EP2604996A1 (en) * | 2011-12-14 | 2013-06-19 | Geoservices Equipements | Method for preparing a sample of rock cuttings extracted from a subsoil and associated analysis assembly |
WO2013088414A1 (en) * | 2011-12-14 | 2013-06-20 | Geoservices Equipements | Method for preparing a sample of rock cuttings extracted from a subsoil and associated analysis assembly |
CN113107477A (en) * | 2021-05-27 | 2021-07-13 | 成都理工大学 | Portable field sample preservation method |
Also Published As
Publication number | Publication date |
---|---|
GB2098919A (en) | 1982-12-01 |
NO159437B (en) | 1988-09-19 |
CA1188063A (en) | 1985-06-04 |
NO821738L (en) | 1982-11-29 |
NO159437C (en) | 1988-12-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4419314A (en) | Method of coating core samples | |
US4312414A (en) | Method and apparatus for obtaining saturation data from subterranean formations | |
US5079948A (en) | Method for conducting capillary pressure drainage and imbibition on a core sample of a porous rock | |
US6166546A (en) | Method for determining the relative clay content of well core | |
US4253327A (en) | Method and apparatus for measuring rock permeability at elevated pressures and temperature | |
US7552648B2 (en) | Measuring mechanical properties | |
US8805616B2 (en) | Method to characterize underground formation | |
US4587857A (en) | Method for mounting poorly consolidated core samples | |
Walls | Tight gas sands-permeability, pore structure, and clay | |
US5844136A (en) | Device for measuring the permeability of rock fragments | |
US10724317B2 (en) | Sealed core storage and testing device for a downhole tool | |
US4458528A (en) | Stickometer | |
US5269999A (en) | Preparation of core samples | |
Omoregie | Factors affecting the equivalency of different capillary pressure measurement techniques | |
US2662401A (en) | Sampling and handling of mineral specimens | |
US4359901A (en) | Method for making measurements of the chemical swelling effect of a fluid on a shale | |
US4595878A (en) | NMR measurement on frozen cores | |
CN109443865B (en) | Full-diameter core comprehensively reflecting characteristics of horizontal-section shale and preparation method and application thereof | |
US2617296A (en) | Process for treating core samples | |
Ham et al. | Effect of saturation on mobility of low liquid-vapor ratio fluids | |
Ewy et al. | Behavior of a reactive shale from 12000 feet depth | |
Swanson et al. | The Measurement Of Petrqphyshcal Properties Of Unconsolidated Sand Cores | |
US4852400A (en) | Method and apparatus for determining physical integrity of geological strata | |
US2662395A (en) | Permeability test container | |
Stewart et al. | Boundary effect on porosity measurements and its resolution by method and mathematical means |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: CORE LABORATORIES, INC., 7501 STEMMONS FREEWAY, BO Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:BUSH DARRELL;REEL/FRAME:003873/0539 Effective date: 19810601 |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, PL 96-517 (ORIGINAL EVENT CODE: M170); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 4 |
|
AS | Assignment |
Owner name: WESTERN ATLAS INTERNATIONAL, INC., 10,001 RICHMOND Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:WESTERN GEOPHYSICAL COMPANY OF AMERICA, A CORP OF DE;REEL/FRAME:004725/0239 Effective date: 19870430 |
|
FEPP | Fee payment procedure |
Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, PL 96-517 (ORIGINAL EVENT CODE: M171); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 8 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
AS | Assignment |
Owner name: CORE HOLDINGS B.V., (A DUTCH CORP.), NETHERLANDS Free format text: MORTGAGE;ASSIGNOR:CORE LAB HOLDINGS, INC.;REEL/FRAME:007186/0048 Effective date: 19940930 Owner name: DOMESTIC AGENT FOR RECEIVING PARTY IS: MEESPIERSON Free format text: MORTGAGE;ASSIGNOR:CORE LAB HOLDINGS, INC.;REEL/FRAME:007186/0048 Effective date: 19940930 |
|
AS | Assignment |
Owner name: CORE HOLDINGS B.V., TEXAS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WESTERN ATLAS INTERNATIONAL, INC.;REEL/FRAME:007185/0581 Effective date: 19940930 |
|
AS | Assignment |
Owner name: MEESPIERSON N.V., NEW YORK Free format text: CORRECTIVE ASSIGNEE TO CORRECT THE ASSIGNOR AND ASSIGNEE PREVIOUSLY RECORDED ON REEL 7186, FRAME 049.;ASSIGNOR:CORE HOLDINGS B.V. (A DUTCH CORP.);REEL/FRAME:007286/0091 Effective date: 19940930 |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 12TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M185); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 12 |
|
AS | Assignment |
Owner name: CORE LABORATORIES, INC., TEXAS Free format text: GENERAL RELEASE;ASSIGNOR:MEESPIERSON, N.V. NEW YORK AGENCY;REEL/FRAME:008568/0435 Effective date: 19951002 |